Fossil collecting in Pennsylvania / by Donald M. Hoskins. Illus. by Albert Van Olden.

Chicago citation style
Hoskins, Donald M. Fossil collecting in Pennsylvania / by Donald M. Hoskins. Illus. by Albert Van Olden.. Retrieved from the Digital Public Library of America, https://archive.org/details/fossilcollecting00hosk. (Accessed December 14, 2018.)
APA citation style
Hoskins, Donald M, Fossil collecting in Pennsylvania / by Donald M. Hoskins. Illus. by Albert Van Olden.. Retrieved from the Digital Public Library of America, https://archive.org/details/fossilcollecting00hosk
MLA citation style
Hoskins, Donald M. Retrieved from the Digital Public Library of America <https://archive.org/details/fossilcollecting00hosk>.
Note: These citations are programmatically generated and may be incomplete.